Mount a file share to a Python function app using Azure CLI

This Azure Functions sample script creates a function app and creates a share in Azure Files. It then mounts the share so that the data can be accessed by your functions.

Note

The function app created runs on Python version 3.7. Azure Functions also supports Python versions 3.6 and 3.8.

If you don't have an Azure subscription, create a free account before you begin.

Prerequisites

  • Use the Bash environment in Azure Cloud Shell.

    Launch Cloud Shell in a new window

  • If you prefer, install the Azure CLI to run CLI reference commands.

    • If you're using a local installation, sign in to the Azure CLI by using the az login command. To finish the authentication process, follow the steps displayed in your terminal. For additional sign-in options, see Sign in with the Azure CLI.

    • When you're prompted, install Azure CLI extensions on first use. For more information about extensions, see Use extensions with the Azure CLI.

    • Run az version to find the version and dependent libraries that are installed. To upgrade to the latest version, run az upgrade.

  • This tutorial requires version 2.0 or later of the Azure CLI. If using Azure Cloud Shell, the latest version is already installed.

Sample script

This script creates a function app in Azure Functions using the Consumption plan.

#!/bin/bash

# Function app and storage account names must be unique.
export AZURE_STORAGE_ACCOUNT=mystorageaccount$RANDOM
functionAppName=myserverlessfunc$RANDOM
region=westeurope
pythonVersion=3.7 #3.6 also supported
shareName=myfileshare
directoryName=mydir
shareId=myshare$RANDOM
mountPath=/mounted

# Create a resource group.
az group create --name myResourceGroup --location $region

# Create an Azure storage account in the resource group.
az storage account create \
  --name $AZURE_STORAGE_ACCOUNT \
  --location $region \
  --resource-group myResourceGroup \
  --sku Standard_LRS

# Set the storage account key as an environment variable. 
export AZURE_STORAGE_KEY=$(az storage account keys list -g myResourceGroup -n $AZURE_STORAGE_ACCOUNT --query '[0].value' -o tsv)

# Create a serverless function app in the resource group.
az functionapp create \
  --name $functionAppName \
  --storage-account $AZURE_STORAGE_ACCOUNT \
  --consumption-plan-location $region \
  --resource-group myResourceGroup \
  --os-type Linux \
  --runtime python \
  --runtime-version $pythonVersion \
  --functions-version 2

# Work with Storage account using the set env variables.
# Create a share in Azure Files.
az storage share create \
  --name $shareName 

# Create a directory in the share.
az storage directory create \
  --share-name $shareName \
  --name $directoryName

az webapp config storage-account add \
  --resource-group myResourceGroup \
  --name $functionAppName \
  --custom-id $shareId \
  --storage-type AzureFiles \
  --share-name $shareName \
  --account-name $AZURE_STORAGE_ACCOUNT \
  --mount-path $mountPath \
  --access-key $AZURE_STORAGE_KEY

az webapp config storage-account list \
  --resource-group myResourceGroup \
  --name $functionAppName

  

Clean up deployment

After the sample script has been run, the following command can be used to remove the resource group and all resources associated with it.

az group delete --name myResourceGroup

Script explanation

Each command in the table links to command specific documentation. This script uses the following commands:

Command Notes
az group create Creates a resource group in which all resources are stored.
az storage account create Creates an Azure Storage account.
az functionapp create Creates a function app.
az storage share create Creates an Azure Files share in storage account.
az storage directory create Creates a directory in the share.
az webapp config storage-account add Mounts the share to the function app.
az webapp config storage-account list Shows file shares mounted to the function app.

Next steps

For more information on the Azure CLI, see Azure CLI documentation.

Additional Azure Functions CLI script samples can be found in the Azure Functions documentation.